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  COVID-19 SEIMC Score

Sex Female (0)

Male (1)
O2 Saturation  
Neutrophil Count  
Lymphocyte Count  
eGFR CKD Epi  
Dyspnea No (0)

Yes (1)

Important: Inputs must be complete to perform calculation.

Neut Lymph Ratio  
SEIMC Score  
Decimal Precision  

Include literature references: Yes   No

  SEIMC Score Interpretation

0 to 2 points: Low risk with 0 to 2.1% 30-day mortality
3 to 5 points: Moderate risk with 4.7 to 6.3% 30-day mortality
6 to 8 points: High risk with 4.5 to 19.5% 30-day mortality
9 to 30 points: Very High risk with 19 to 100% 30-day mortality


  • This calculator represents findings from the literature referenced below. It is important to understand that these findings may not be representative of the experience in your local healthcare system.
  • The 30-day mortality estimates above represent the combined data of the Derivation and Validation Cohorts in this study.
  • SEIMC: Spanish Society of Infectious Diseases and Clinical Microbiology.

Equations used
NeutLymphRatio = NeutrophilCount / LymphocyteCount
SEIMCScore = AgeFactor + Sex + O2SatFactor + NeutLymphRatioFactor + eGFRFactor + Dyspnea


Calculation Details and Variables
  • AgeFactor is assigned values by this ordered logic:
    • If Age ≥90 yr AgeFactor = 21
    • Else if Age ≥85 yr AgeFactor = 15
    • Else if Age ≥80 yr AgeFactor = 14
    • Else if Age ≥75 yr AgeFactor = 9
    • Else if Age ≥65 yr AgeFactor = 5
    • Else if Age ≥55 yr AgeFactor = 3
    • Else if Age ≥40 yr AgeFactor = 1
    • Else AgeFactor = 0.
  • Equation parameters such as Sex, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0), represent the values that will be used.
  • eGFRFactor is assigned values by this ordered logic:
    • If eGFR CKD Epi <30 mL/min/1.73 m(2) eGFRFactor = 3
    • Else if eGFR CKD Epi ≤59 mL/min/1.73 m(2) eGFRFactor = 2
    • Else eGFRFactor = 0.
  • The O2SatFactor defult value is 0 points. If the subject is 50 years old or younger, and the O2 Saturation is 93% or lower, O2SatFactor is assigned 1 point. For subjects older than 50 years, the O2SatFactor is assigned 1 point when the O2 Saturation is 93% or lower.
  • The default NeutLymphRatioFactor is 0 points. If the Neut Lymph Ratio >6.33 the NeutLymphRatioFactor is assigned 2 points. Else if the Neut Lymph Ratio ≥3.22 and ≤6.33 the NeutLymphRatioFactor is assigned 1 point.

  1. Berenguer J, Borobia AM, Ryan P, et al. Development and validation of a prediction model for 30-day mortality in hospitalised patients with COVID-19: the COVID-19 SEIMC score. Thorax. 2021 Feb 25:thoraxjnl-2020-216001. PubMed ID: 33632764 PubMed Logo

Associated Medical Subject Headings [MeSH]
         80 and over,   Adult,   Age Factors,   Aged,   COVID-19,   Dyspnea,   Female,   Glomerular Filtration Rate,   Hospital Mortality,   Humans,   Inpatients,   Logistic Models,   Lymphocyte Count,   Male,   Middle Aged,   Neutrophils,   Oxygen,   ROC Curve,   Risk Factors,   SARS-CoV-2,   Sex Factors

Associated Logical Observation Identifiers Names and Codes [LOINC]
Parameter LOINC's and Suggested Units
Age 21612-7 : yr      21612-7 : yr      21612-7 : years      30525-0 : Years old      30525-0 : yr      30525-0 : years      
O2 Saturation 2708-6 : %      2713-6 : %      51733-4 : %      59408-5 : %      
Neutrophil Count 751-8 : 10^3/microL      26499-4 : 10^3/microL      753-4 : 10^3/microL      
Lymphocyte Count 731-0 : x10^3/microL      26474-7 : x10^3/microL      732-8 : x10^3/microL      
eGFR CKD Epi 62238-1 : mL/min/1.73m2      

This material contains content from LOINC® (http://loinc.org). The LOINC table, LOINC codes, and LOINC panels and forms file are copyright © 1995-2014, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and available at no cost under the license at http://loinc.org/terms-of-use.

Associated ICD10-CM Codes
   J12.9Viral pneumonia, unspecified
   J12.89Other viral pneumonia


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